Digital BW, The Print

hi,
should i be loading 13x19 Silver Rag in the manual sheet feeder (the
one in back where you attach a guide) or the auto sheet feeder (the
one that flips open on the top of the printer)?

reason i ask is that i did a print that in the mid-tones i get some
banding. i cleaned the heads, aligned, nozzel check and printed the
same image out 3 times, same banding, same areas. i did a small
version of the print about 5x7 on 8.5x11 silver rag and no banding.

my other thought, other than where to feed this paper into the
printer, is that i used "photo" quality rather than "best photo" or
"photo rpm".

thanks
steve